... /1800Q2403SMS,MMS900/1800Q2406SMS,MMS,TCP Protocol900/1800Q24plusSMS,MMS,TCP Protocol850/900/1800/1900Applications · Large shopping malls, supermarkets· Professional market, large wholesalers· ... big/small) slotsComply with GSM phase2 standardSend and receive SMS,MMS Maximum transmitting speed 115KBpsInput voltage: 100 to 240VWorking temperature: ... channel USB gsm modem/sim box modem, support SMS,MMS